191831461 has 2 divisors, whose sum is σ = 191831462. Its totient is φ = 191831460.

The previous prime is 191831413. The next prime is 191831483. The reversal of 191831461 is 164138191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180230625 + 11600836 = 13425^2 + 3406^2 .

It is a cyclic number.

It is not a de Polignac number, because 191831461 - 2¹⁵ = 191798693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191831161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95915730 + 95915731.

It is an arithmetic number, because the mean of its divisors is an integer number (95915731).

Almost surely, 2^191831461 is an apocalyptic number.

It is an amenable number.

191831461 is a deficient number, since it is larger than the sum of its proper divisors (1).

191831461 is an equidigital number, since it uses as much as digits as its factorization.

191831461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 191831461 is about 13850.3234980270. The cubic root of 191831461 is about 576.7309764150.

The spelling of 191831461 in words is "one hundred ninety-one million, eight hundred thirty-one thousand, four hundred sixty-one".